WO2023216757A1 - Appareil de blindage et dispositif électrique - Google Patents

Appareil de blindage et dispositif électrique Download PDF

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Publication number
WO2023216757A1
WO2023216757A1 PCT/CN2023/085058 CN2023085058W WO2023216757A1 WO 2023216757 A1 WO2023216757 A1 WO 2023216757A1 CN 2023085058 W CN2023085058 W CN 2023085058W WO 2023216757 A1 WO2023216757 A1 WO 2023216757A1
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WO
WIPO (PCT)
Prior art keywords
shielding
coil
coil structure
central hole
wire
Prior art date
Application number
PCT/CN2023/085058
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English (en)
Chinese (zh)
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WO2023216757A9 (fr
Inventor
张泽龙
胡小情
景遐明
黄朱勇
Original Assignee
华为数字能源技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为数字能源技术有限公司 filed Critical 华为数字能源技术有限公司
Publication of WO2023216757A1 publication Critical patent/WO2023216757A1/fr
Publication of WO2023216757A9 publication Critical patent/WO2023216757A9/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/38—Auxiliary core members; Auxiliary coils or windings

Definitions

  • the present application relates to the technical field of electrical equipment, and in particular, to a shielding device and electrical equipment.
  • electric field shielding technology is widely used in order to obtain higher insulation reliability. Moreover, a good electric field shielding solution can effectively reduce the amount of partial discharge of the device and extend the service life of the device.
  • existing electric field shielding solutions usually use conductive paint or metal coatings to shield medium and high-voltage coil structures. Specifically, an insulating layer is cast using insulating materials to isolate the medium and high-voltage coil structure from the low-voltage potential, and conductive paint or metal coating is arranged on the surface of the insulating layer through processes such as lamination, electroplating, evaporation, pouring or spraying.
  • a conductive layer is formed, and the conductive layer is connected to the low-voltage potential, thereby performing electric field shielding and obtaining a good insulation effect between the medium and high-voltage coil structure and the low-voltage potential.
  • the process technology required for this shielding method is relatively complex, the cost is high, and it is not convenient for batch processing.
  • This application provides a shielding device and electrical equipment to facilitate electric field shielding of the coil structure.
  • the present application provides a shielding device for a coil structure, the coil structure having a first central hole.
  • the shielding device may include a first shielding part and an insulating part.
  • the first shielding part may include a first wire, the first wire may pass through the first central hole and be wound around the coil structure to form the first shielding coil, the first end of the first wire may be used to connect to the high voltage potential, and the first wire may The second end can be an open circuit.
  • the insulating part may wrap the coil structure and the first shielding part, the insulating part may have a second central hole, and the second central hole may be located in the first central hole.
  • a first wire is wound around a coil structure to form a first shielding coil.
  • the first wire is connected to a high-voltage potential.
  • the first shielding part can serve as a high-voltage electric field shielding function.
  • the shielding device has insulating properties and can ensure that the shielded part is electrified.
  • the body has good power frequency voltage withstand capability and excellent lightning impact protection capability. It can also effectively suppress the partial discharge phenomenon of the shielded charged body and extend the service life of the charged body.
  • the first shielding coil formed by winding the first wire is not easily affected by the expansion stress of the insulation part.
  • the resistivity of the first shielding part is relatively stable, and the shielding device can maintain a relatively reliable electric field shielding effect.
  • the structure of the shielding device is relatively simple, the process technology required for molding is also relatively simple, the cost is low, and it is easy to apply in batch processing.
  • the first shielding coil may include a plurality of first shielding coil units, and the plurality of first shielding coil units may be arranged at equal intervals along the circumferential direction of the coil structure.
  • the difference in resistivity of the first shielded coil at different positions in the circumferential direction of the coil structure can be smaller, that is, the difference in resistivity of the first shielding portion at different positions in the circumferential direction of the coil structure can be smaller, that is, the resistivity of the first shielding portion is consistent.
  • the property can be higher, and the first shielding part can have a relatively uniform The electric field is distributed, so that the electric field shielding effect of the first shielding part is ideal.
  • the first end of the first wire may be electrically connected to one end of the coil structure.
  • the first shielding part can be at a high voltage potential, and the first shielding part can play a high-voltage electric field shielding role.
  • the shielding device may further include a second shielding part, the second shielding part may include a second wire, and the second wire may pass through the second central hole and be wound around the coil structure to form a second shielding coil,
  • the first end of the second conductor may be used for connection to the low voltage potential, and the second end of the second conductor may be open circuit.
  • the second shielding part can be at a low-voltage potential, and the second shielding part can play a low-voltage electric field shielding role.
  • the second shielding coil may include a plurality of second shielding coil units, and the plurality of second shielding coil units may be arranged at equal intervals along the circumferential direction of the coil structure.
  • the resistivity difference of the second shielded coil at different positions in the circumferential direction of the coil structure can be smaller, that is, the resistivity difference of the second shielding portion at different positions in the circumferential direction of the coil structure can be smaller, that is, the resistivity of the second shielding portion is consistent.
  • the resistance can be higher, the second shielding part can also have a relatively uniform electric field distribution, the electric field shielding effect of the second shielding part is also ideal, and the insulation performance of the shielding device is more reliable.
  • the shielding device may further include a third shielding part.
  • the third shielding part may include a shielding film.
  • the shielding film may wrap the coil structure, the first shielding part and the insulating part.
  • the shielding film may be For connection to low voltage potential. In this way, the third shielding part can be at a low-voltage potential, and the third shielding part can play a low-voltage electric field shielding role.
  • the present application provides a shielding device for a coil structure, the coil structure having a first central hole.
  • the shielding device may include a first shielding part, an insulation part and a second shielding part.
  • the first shielding part may include a shielding film, the shielding film may wrap the coil structure, and the shielding film may be used to connect to the high voltage potential.
  • the first shield part may have a third central hole, and the third central hole may be located within the first central hole.
  • the insulating part may wrap the coil structure and the first shielding part, the insulating part may have a second central hole, and the second central hole may be located in the third central hole.
  • the second shielding part may include a conductor, the conductor may pass through the second central hole and be wound around the coil structure to form a shielded coil, the first end of the conductor may be used to connect to a low-voltage potential, and the second end of the conductor may be an open circuit.
  • the shielding film of the first shielding part is wrapped around the coil structure and connected to the high-voltage potential, so that the first shielding part can play a high-voltage electric field shielding role.
  • the wires of the second shielding part are wound around the coil structure to form a shielding coil, and the wires are connected to the low-voltage potential, so that the second shielding part can function as a low-voltage electric field shielding.
  • the first shielding part and the second shielding part work together to make the electric field shielding effect of the shielding device more ideal and the insulation performance more reliable, which can ensure that the shielded charged body has good power frequency withstand voltage capabilities and lightning impact protection capabilities, and can Effectively suppress the partial discharge phenomenon of the shielded charged body and extend the service life of the charged body.
  • the shielding device has a relatively simple structure, the process technology required for molding is also relatively simple, the cost is low, and it is convenient for batch processing.
  • the shielding coil may include multiple shielding coil units, and the multiple shielding coil units may be arranged at equal intervals along the circumferential direction of the coil structure.
  • the resistivity difference of the shielded coil at different positions in the circumferential direction of the coil structure can be smaller, that is, the resistivity difference of the second shielding part at different positions in the circumferential direction of the coil structure can be smaller, that is, the resistivity consistency of the second shielding part can be Higher, the second shielding part has a relatively uniform electric field distribution, and the electric field shielding effect of the second shielding part is relatively ideal.
  • the shielding film may be electrically connected to one end of the coil structure.
  • the first shielding part can be at a high voltage potential, and the first shielding part can play a high-voltage electric field shielding role.
  • the present application provides an electrical device, including a coil structure, and a shielding device as in any of the possible implementations of the first aspect or the second aspect.
  • the electric field shielding effect of the shielding device is relatively ideal, and the insulation performance is relatively reliable. It can ensure that the shielded charged body has good power frequency withstand voltage capabilities and lightning impact protection capabilities, and can also effectively suppress the shielded charged body. It shields the partial discharge phenomenon of the charged body and extends the service life of the charged body. As a result, the electrical equipment has higher working stability and longer service life.
  • Figure 1 is a schematic diagram of the coil structure
  • Figure 2 is a schematic structural diagram of the first shielding part of the shielding device provided by the embodiment of the present application.
  • Figure 3 is a schematic structural diagram of a shielding device provided by an embodiment of the present application.
  • Figure 4 is a schematic diagram of the main magnetic circuit of the coil structure
  • Figure 5 is a schematic structural diagram of a shielding device provided by another embodiment of the present application.
  • Figure 6 is a schematic structural diagram of a shielding device provided by another embodiment of the present application.
  • Figure 7 is a cross-sectional view of the shielding device in Figure 6 along the A-A direction;
  • Figure 8 is a schematic structural diagram of the first shielding part of the shielding device provided by another embodiment of the present application.
  • Figure 9 is a schematic structural diagram of the insulating part of the shielding device provided by another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of the second shielding part of the shielding device provided by another embodiment of the present application.
  • the shielding device provided by the embodiment of the present application can be adapted to electrical equipment, such as medium and high voltage electrical equipment.
  • electrical equipment such as medium and high voltage electrical equipment.
  • it can be applied in the field of transformers as an electric field shielding device for the coil structure of the transformer to achieve an insulation effect.
  • the shielding device provided by the embodiment of the present application is not limited to application in medium and high voltage coil structures and medium and high voltage magnetic parts, and can also be applied in electrical equipment such as medium and high voltage frequency converters and DC microgrids.
  • a transformer is an electrical appliance that uses the principle of electromagnetic induction to transfer electrical energy or signals from one circuit to another.
  • Transformers usually include an iron core (or magnetic core) and a coil.
  • the coil is wound around the iron core (or magnetic core).
  • the coil usually has two or more windings, of which the winding connected to the power supply is called the primary coil (or primary winding).
  • the remaining windings are called secondary coils (or secondary windings).
  • Electrical energy is transmitted between the primary coil and the secondary coil, converting the AC voltage and current of one circuit into the voltage and current of another circuit.
  • Both the primary and secondary coils have central holes in which the iron core (or magnetic core) is located.
  • the shielding device involved in this application can be applied to both the primary coil and the secondary coil.
  • conductive paint or metal coatings Existing coil structures and other medium and high voltage charged objects are usually shielded using conductive paint or metal coatings. Specifically, an insulating layer is first formed on the surface of the coil structure, and then conductive paint or metal coating is arranged on the surface of the insulating layer to form a conductive layer through processes such as lamination, electroplating, evaporation, pouring or spraying. When used specifically, the conductive layer is connected to the low-voltage potential, thereby shielding the electric field and achieving a good insulation effect between the coil structure and the low-voltage potential.
  • the process technology required for this shielding method is relatively complex, the cost is high, and it is not convenient for batch processing.
  • embodiments of the present application provide a shielding device to facilitate electric field shielding of the coil structure.
  • Figure 1 shows a schematic structural diagram of the coil structure.
  • Figure 2 shows a schematic diagram of the present application.
  • FIG. 3 shows a schematic structural diagram of the shielding device provided by the embodiment of the present application.
  • the shielding device provided by the embodiment of the present application can be used in the coil structure 100.
  • the coil structure 100 has a first central hole 101.
  • the shielding device may include a first shielding part 200 and an insulating part 300 .
  • the first shielding part 200 may include a first wire.
  • the first conductor may be a multi-stranded Litz wire, a film-coated wire, a silk-coated wire, a flat wire, a three-layer insulated wire or a copper tape.
  • the first wire may pass through the first central hole 101 and wrap around the coil structure 100, thereby forming a first shielded coil.
  • the first end of the first wire may be connected to a high voltage potential, and the second end of the first wire may be open circuit, so that the first shielding part 200 may be at a high voltage potential, and the first shielding part 200 may function as a high voltage electric field shield.
  • the insulation part 300 can wrap the coil structure 100 and the first shielding part 200 therein.
  • the insulation part 300 may be made of epoxy resin, rubber or other insulation materials.
  • the insulation part 300 may have a second central hole 301 , and the second central hole 301 may be located within the first central hole 101 .
  • the second central hole 301 may be coaxially disposed with the first central hole 101 .
  • the iron core (or magnetic core) of the transformer may be located in the second central hole 301 .
  • the first wire winding coil structure 100 forms a first shielding coil.
  • the first wire is connected to a high-voltage potential.
  • the first shielding part 200 can play a high-voltage electric field shielding role.
  • the shielding device has insulating properties and can It ensures that the shielded charged body has good power frequency withstand voltage and lightning impact protection capabilities. It can also effectively suppress the partial discharge phenomenon of the shielded charged body and extend the service life of the charged body.
  • the shielding device when the shielding device is subjected to temperature shock, such as when the heat of the shielded charged body changes, the first shielding coil formed by winding the first wire is not easily affected by the expansion stress of the insulating part 300, and the resistivity of the first shielding part 200 It is relatively stable and the electric field shielding effect of the shielding device is relatively reliable.
  • the structure of the shielding device is relatively simple, the process technology required for molding is also relatively simple, the cost is low, it is convenient for batch processing, and can improve the consistency of batch processing of products.
  • the first shielding coil may include a plurality of first shielding coil units, that is, the first wire may be wound around the coil structure more than 100 times.
  • Each turn of the first conductor is a first shielding coil unit, and multiple first shielding coil units constitute a first shielding coil.
  • the distance between adjacent first shielded coil units along the circumferential direction of the coil structure 100 is called the inter-turn distance of the first shielded coil.
  • a plurality of first shielding coil units may be arranged at equal intervals along the circumferential direction of the coil structure 100 , that is, the first shielding coils may be coils with equal distance between turns. Therefore, the resistivity difference of the first shielding coil at different positions in the circumferential direction of the coil structure 100 is small, that is, the resistivity difference of the first shielding portion 200 at different positions in the circumferential direction of the coil structure 100 is small. That is to say, the first shielding The resistivity consistency of the first shielding part 200 is relatively high, the first shielding part 200 has a relatively uniform electric field distribution, the electric field shielding effect of the first shielding part 200 is relatively ideal, and the shielding device has high insulation reliability.
  • the shielding device when the shielding device uses first shielding coils of different specifications, the shielding device has different electric field shielding effects.
  • the shielding device can have different electric field shielding effects by selecting first shielding coils with different distances between turns. For example, by selecting the first shielding coil with a smaller distance between turns, the shielding device will have a stronger electric field. Shielding effect.
  • the shielding device can also have different electric field shielding effects by selecting first wires of different thicknesses. For example, if a thicker first wire is selected, the shielding device will have a stronger electric field shielding effect.
  • the shielding device when the shielding device uses first shielding coils of different specifications, the shielding device has different effects on the AC resistance of the coil structure 100, and thus has different effects on the overall heat loss of the transformer. For example, if a first shielded coil with a larger distance between turns is selected, the coil structure 100 will have a smaller AC resistance, and the overall heat loss of the transformer will be smaller; if a thinner first wire is selected, the coil structure 100 will have a smaller The smaller the AC resistance, the smaller the overall heat loss of the transformer.
  • the first shielding coil with different inter-turn distances at different positions can also be used, and the first shielding coil with the first conductors having different thicknesses at different positions can also be used.
  • the distance between turns of the first shielded coil needs to be greater than zero, that is, there is no contact between adjacent turns of the first shielded coil, thereby ensuring that the first shielded coil does not constitute a major factor in the coil structure.
  • a closed loop of the magnetic circuit thus not affecting the electrical parameters of the transformer.
  • the first end of the first wire may be electrically connected to one end of the coil structure 100 .
  • the starting line of the coil structure 100 is electrically connected to the high voltage potential of the system, and the first end of the first conductor may be electrically connected to the starting line of the coil structure 100 .
  • the first end of the first conductor can be connected to other high voltage potentials of the transformer system. Therefore, the first shielding part 200 can be at a high voltage potential, and the first shielding part 200 can function as a high-voltage electric field shielding function.
  • FIG. 5 shows a schematic structural diagram of a shielding device provided by another embodiment of the present application.
  • the shielding device may further include a second shielding part 400 .
  • the second shield part 400 may include a second conductive wire.
  • the second wire may pass through the second central hole 301 and wrap around the insulation part 300, thereby wrapping the coil structure.
  • the second wire is wound around the coil structure to form a second shielding coil.
  • the first end of the second conductor may be connected to the low voltage potential, and the second end of the second conductor may be open circuit. Therefore, the second shielding part 400 can be at a low voltage potential, and the second shielding part 400 can function as a low-voltage electric field shielding.
  • the second shielding coil may include a plurality of second shielding coil units, that is, the second wire may be wound around the coil structure multiple times, and each turn of the second wire is a second shielding coil unit, and multiple second wires may be wound around the coil structure multiple times.
  • the two shielding coil units constitute a second shielding coil.
  • the plurality of second shielding coil units may be arranged at equal intervals along the circumferential direction of the coil structure, that is, the second shielding coil may be a coil with equal distance between turns.
  • the resistivity difference of the second shielded coil at different positions in the circumferential direction of the coil structure is small, that is, the resistivity difference of the second shielding part 400 at different positions in the circumferential direction of the coil structure is small. That is to say, the second shielding part 400
  • the resistivity consistency is also high, the second shielding part 400 also has a relatively uniform electric field distribution, the electric field shielding effect of the second shielding part 400 is also relatively ideal, and the insulation performance of the shielding device is more reliable.
  • the distance between turns of the second shielding coil also needs to be greater than zero, that is, there is no contact between adjacent turns of the second shielding coil, thereby ensuring that the second shielding coil does not form a closed loop regarding the main magnetic circuit of the coil structure. , so as not to affect the electrical parameters of the transformer.
  • Figure 6 shows a schematic structural diagram of a shielding device provided by another embodiment of the present application
  • Figure 7 shows a cross-sectional view of the shielding device in Figure 6 along the A-A direction.
  • the shielding device may further include a third shielding part 500 .
  • the third shielding part 500 may include a shielding film.
  • the shielding device may not include the second shielding part.
  • the shielding film can wrap the coil structure 100, the first shielding part 200 and the insulating part 300.
  • the shielding film can be made of semi-conductive crepe paper.
  • the shielding film may be evenly wrapped around the outer wall of the insulating part 300 .
  • the shielding film can be connected to a low-voltage potential, so that the shielding film can be at a low-voltage potential, and the third shielding part 500 can play a low-voltage electric field shielding role.
  • the shielding device provided by the embodiments of the present application may also have other specific implementations.
  • Figure 8 shows a schematic structural view of the first shielding part of the shielding device provided by another embodiment of the present application.
  • Figure 9 shows a schematic structural view of the insulating part of the shielding device provided by another embodiment of the present application.
  • Figure 10 shows is a schematic structural diagram of the second shielding part of the shielding device provided by another embodiment of the present application.
  • the shielding device can be used in a coil structure, and the coil structure has a first central hole.
  • the shielding device may include a first shielding part 200, an insulation part 300 and a second shielding part 400.
  • the first shielding part 200 may include a shielding film.
  • the shielding film may be semi-conductive crepe paper.
  • the shielding film can wrap the coil structure. Specifically, the shielding film can pass through the first central hole and wrap around the coil structure. Since the shielding film passes through the first central hole and is wound around the coil structure, the first shielding part 200 composed of the shielding film has a third central hole 201 located in the first central hole, specifically, the third central hole 201 is located in the first central hole. Hole 201 may be disposed coaxially with the first central hole.
  • the shielding film can be connected to a high-voltage potential, so that the first shielding part 200 can be at a high-voltage potential, and the first shielding part 200 can function as a high-voltage electric field shield.
  • the insulation part 300 can wrap the coil structure and the first shielding part 200 inside.
  • the insulation part 300 may have a second central hole 301 , and the second central hole 301 may be located within the third central hole 201 .
  • the iron core (or magnetic core) of the transformer may be located in the second central hole 301 .
  • the second shielding part 400 may include wires, and the wires may pass through the second central hole 301 and be wound around the coil structure, thereby forming a shielding coil.
  • the first end of the conductor can be connected to a low-voltage potential, the second end of the conductor can be disconnected, and the second shielding portion 400 can function as a low-voltage electric field shield.
  • the shielding film of the first shielding part 200 is wrapped around the coil structure and connected to the high-voltage potential, so that the first shielding part 200 can function as a high-voltage electric field shielding.
  • the wire-wound coil structure of the second shielding part 400 forms a shielding coil, and the wires are connected to low-voltage potential, so that the second shielding part 400 can function as a low-voltage electric field shield.
  • the first shielding part 200 and the second shielding part 400 work together.
  • the insulation performance of the shielding device is relatively reliable, which can ensure that the shielded charged body has good power frequency withstand voltage capabilities and lightning impact protection capabilities, and can effectively suppress the shielded
  • the partial discharge phenomenon of charged objects extends the service life of charged objects.
  • the shielding device has a relatively simple structure, the process technology required for molding is also relatively simple, the cost is low, and it is convenient for batch processing.
  • the shielding film can be electrically connected to one end of the coil structure.
  • the origin of the coil structure is electrically connected to the high voltage potential of the system, and the shielding film can be electrically connected to the origin of the coil structure.
  • the shielding membrane can be connected to other high-voltage potentials of the transformer. Therefore, the first shielding part 200 can be at a high voltage potential, and the first shielding part 200 can function as a high-voltage electric field shielding function.
  • the shielding coil may include multiple shielding coil units, that is, the conductor may be wound around the coil structure multiple times, and each turn of the conductor is a shielding coil unit, and multiple shielding coil units constitute a shielding coil.
  • multiple shielding coil units can be arranged at equal intervals along the circumferential direction of the coil structure, that is, the shielding coils can be coils with equal distance between turns, so that the resistivity difference of the shielding coil at different positions in the circumferential direction of the coil structure is small, that is, the first The difference in resistivity between the two shielding parts 400 at different positions in the circumferential direction of the coil structure is small. That is to say, the resistivity of the second shielding part 400 is relatively consistent.
  • the second shielding part 400 has a relatively uniform electric field distribution.
  • the second shielding part 400 has a relatively uniform electric field distribution.
  • the electric field shielding effect of part 400 is relatively ideal, and the insulation performance of the shielding device is relatively reliable.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

L'invention concerne un appareil de blindage et un dispositif électrique. L'appareil de blindage est utilisé pour une structure de bobine, et la structure de bobine est pourvue d'un premier trou central. L'appareil de blindage comprend une première partie de blindage et une partie isolante. La première partie de blindage comprend un premier fil ; le premier fil passe à travers le premier trou central et est enroulé autour de la structure de bobine pour former une première bobine de blindage ; une première extrémité du premier fil est utilisée pour se connecter à un premier potentiel haute tension ; une seconde extrémité du premier fil est déconnectée. La partie isolante enveloppe la structure de bobine et la première partie de blindage, la partie isolante est pourvue d'un second trou central, et le second trou central est situé dans le premier trou central. Lorsque la structure est utilisée, la première partie de blindage peut jouer un rôle de blindage de champ électrique à haute tension ; l'appareil de blindage a des propriétés isolantes ; de plus, l'appareil de blindage a une structure simple, la technologie de processus requise pour la formation est également simple, les coûts sont faibles et l'appareil de blindage est pratique à appliquer en traitement par lots.
PCT/CN2023/085058 2022-05-10 2023-03-30 Appareil de blindage et dispositif électrique WO2023216757A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210505602.7A CN117079949A (zh) 2022-05-10 2022-05-10 屏蔽装置及电气设备
CN202210505602.7 2022-05-10

Publications (2)

Publication Number Publication Date
WO2023216757A1 true WO2023216757A1 (fr) 2023-11-16
WO2023216757A9 WO2023216757A9 (fr) 2023-12-21

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PCT/CN2023/085058 WO2023216757A1 (fr) 2022-05-10 2023-03-30 Appareil de blindage et dispositif électrique

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WO (1) WO2023216757A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806896A (en) * 1986-01-17 1989-02-21 Mitsubishi Denki Kabushiki Kaisha Electromagnetic shield for electromagnetic apparatus
CN206574585U (zh) * 2017-01-24 2017-10-20 株洲一帆科技有限公司 脉冲变压器
WO2021130819A1 (fr) * 2019-12-23 2021-07-01 三菱電機株式会社 Bobine d'induction statique
CN214384730U (zh) * 2021-01-20 2021-10-12 余姚市中驰电器有限公司 一种低漏磁低干扰变压器
CN215342269U (zh) * 2021-03-22 2021-12-28 厦门台和电子有限公司 一种高稳定性变压器结构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806896A (en) * 1986-01-17 1989-02-21 Mitsubishi Denki Kabushiki Kaisha Electromagnetic shield for electromagnetic apparatus
CN206574585U (zh) * 2017-01-24 2017-10-20 株洲一帆科技有限公司 脉冲变压器
WO2021130819A1 (fr) * 2019-12-23 2021-07-01 三菱電機株式会社 Bobine d'induction statique
CN214384730U (zh) * 2021-01-20 2021-10-12 余姚市中驰电器有限公司 一种低漏磁低干扰变压器
CN215342269U (zh) * 2021-03-22 2021-12-28 厦门台和电子有限公司 一种高稳定性变压器结构

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CN117079949A (zh) 2023-11-17

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